After the body of a teenage girl is found in the local cemetery with an enigmatic clue in her pocket, Bakerbury Detective Hooper seeks help from the town's famous resident - Cora Felton, aka 'The Puzzle Lady'.
It's Cora's birthday and she's itching for a case to solve. Becky hires her to investigate a convicted killer's plea of innocence, leading Cora into a tangled web of lies and secrets.